https://doi.org/10.1351/goldbook.15230
Tablet or capsule distinguished from a sustained-release dosage form, by the fact that it releases the medicinal agent, or part of it, at any time other than promptly after administration as opposed to a slow, controlled manner.
Note: A repeat action tablet contains usually two doses of the drug, the first being released immediately following per-oral administration. The second dose is released later, when the layer of enteric coating is dissolved.